Forthcoming from OUP: From Morality to Metaphysics: The Theistic Implications of our Ethical Commitments

This looks like it might well be a moral argument for theism worth reading, as it includes a serious attempt to address the most plausible contemporary secular accounts of ethics. At least in this regard, it looks to follow in the footsteps of Adams in his Finite and Infinite Goods.

Here's the blurb:

Original work at the intersection of philosophy of religion and ethical theory

A distinctive argument for theism

Engages with a wide range of leading secular philosophers

From Morality to Metaphysics
offers an argument for the existence of God, based on our most
fundamental moral beliefs. Angus Ritchie engages with a range of the
most significant religious moral philosophers of our time, and argues
that they all face a common difficulty which only theism can overcome.

The
book begins with a defence of the 'deliberative indispensability' of
moral realism, arguing that the practical deliberation human beings
engage in on a daily basis only makes sense if they take themselves to
be aiming at an objective truth. Furthermore, when humans engage in
practical deliberation, they necessarily take their processes of
reasoning
to have some ability to track the truth. Ritchie's central argument
builds on this claim, to assert that only theism can adequately explain
our capacity for knowledge of objective moral truths. He demonstrates
that we need an explanation as well as a justification of these
cognitive capacities. Evolutionary biology is not able to generate the
kind of explanation which is required--and, in consequence, all secular
philosophical accounts are forced either to abandon moral objectivism or
to render the human capacity for moral knowledge inexplicable. This
case is illustrated with discussions of a wide range of moral
philosophers including Simon Blackburn, Thomas Scanlon, Philippa Foot,
and John McDowell.

Ritchie concludes by arguing that only purposive accounts of the universe (such
as theism and Platonism) can account for human moral knowledge. Among such purposive accounts, From Morality to Metaphysics makes the case for theism as the most satisfying, intelligible explanation of our cognitive capacities.